Clock



J. C. BURKE A ril 5. 1921.

CLOCK Filed Oct. 3, 1923 4 Sheets-Sheet 1 Jain [Wu/la:

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J. C. BURKE April 5 1927.

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W: xrroauzv Patented Apr. 5, 1927.

um? so STATES JOHN G. BURKE. 6F MIDDLESBQBO, KENTUGKY.

CLOCK.

Application filed October 3, 1923. Serial' No. 666,419.

This invention relates to clocks and has for an object the provision of a clock which will operate for a period in excess of one year without rewinding, so that it will be necessary only to wind the clock annually.

Another object of the invention is the provision of means for automatically indicating when the clock requires winding, thus rendering it unnecessary to keep a record of the winding period.

Another object of the invention is the provi ion of afframe structure for clocks which includes a sectional plate, so that the entire movement need not be taken down when it is necessary to replace a main sprin Vith the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings Figure l is a front elevation of a clock mechanism constructed in accordance with the invention.

Figure 2 is a rear View of the same.

Figure 3 is an elevation similar to Figure 1 with the front plate and winding indicator removed.

F igure 4 is an edge View.

Figure 5 is an enlarged section on the line 55 of Figure 4, with the pendulum arm removed.

Figure 6 is a detail view of the back plate of the clock frame, the removable sections of the said plate being shown by dotted lines.

Figures 7 and 8 are detail views of these removable sections or bridge plates.

Referring to the drawings in detail wherein like characters of reference denote corresponding parts, the clock mechanism which may be placed in a casing of any suitable character includes a frame having a. front plate 10 and a back plate 11, the said plates being connected by posts 12.

Mounted between these plates is the time mechanism which is indicated generally at .13 and the striking mechanism indicated at 14. The time mechanism includes a main drive shaft while fixed on this shaft and operated by means of a spring 16 is a driving wheel or master gear 17. This gear drives a pinion 18 and the latter drives a gear 18*, which in turn drives a pinion 22. This last mentioned pinion is mounted upon a shaft 23 which carries a gear 24 and the latter drives a pinion 24 fast upon a shaftwith a gear 24". The gear 24 drives a pinion 24 which is fast upon a shaft with a gear 24 and this last mentioned gear, through a pinion 24 operates an escapement wheel which is controlled by an element 21. The gear 24 engages a pinion 25 mounted upon the center staff 26, while also mounted upon this staff is a minute arbor 27 which is operated through the medium of a pinion 28 and a gear 29. The gear 29 is driven from a pinion 30 which is fast upon the shaft 23.

Operating with the gear 29 is a pinion 31 which engages a gear 32 secured to the hour arbor 33.

The ratio of the gears between the drive shaft 15 and the minute and hour arbors is such that one turn of the shaft 15, or the gear 17, will operate the minute and hour arbors fora period of 41 days, so that When the clock is wound 12 full turns of the drive shaft 15, the movement will operate for a period of 492 days. The clock however should be wound annually.

For the purpose of indicating the time at which the clock should be wound, the shaft 15 has mounted thereon a wheel 34 which hasa single tooth 35 and this tooth engages the teeth of an indicator wheel 36 and moves the said wheel a distance of one tooth with each complete revolution of the shaft 15 so that 12 revolutions of the said shaft will rotate the wheel 36 one revolution to bring the word wind before a suitable sight opening in the clock dial.

The rear plate 11 is of sectional forma tion and includes a stationary section 59 and removable sections or bridge plates 60, secured to the section 59 as by screws 61 and to the lower bars 12 by screws 62. Thus, either bridge plate may be removed so that access may be had to the springs 16 or 38 for the purpose of replacing the springs or otherwise repairing either the time or striking mechanisms. The pendulum of the clock is shown at 63.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall vithin the scope of the appended claim. Having described the invention what is claimed is z- In a clock frame, a plate including an upper fixed section extending approximately from the top to the center of the frame and having openings therein, one of said openings accommodating the center shaft of the clock mechanism, a pair of removable complemental plate sections upon opposite sides of the longitudinal center of the frame, each of said sections having their upper edgesoverlapping the lower edge of the fixed section and extending downward to the bottom 10 of the frame with their adjacent edges abutting and provided with semi-circular recesses to accommodate the center shaft and means to secure the removable sections to the fixed section and to the frame.

In testimony whereof I aflix my signature.

JOHN C. BURKE. 

